On Tue, 6 Jan 2015 02:54:31 +0100 Gilles Aurejac gilles@polysoft.fr wrote:
you're right I did wrote to the flash ship twice (and forgot the -V option the first time). I'm confident that the write operation worked : I first have read and save, then updated this chip (2nd bios chip of a gtx 770 nvidia card) succesfully with flashrom and compared with an hexadecimal the 2 dumps which reported the attempted differences.
If you wish I can ran the write operation again and send you the result.
Hi,
no need, I just wanted to make sure. I have marked the flash chip as fully tested and will commit that later together with other small changes.
Also I did not have the same success with the 1rst bios chip which is not recognized (0Kb) by flashrom, and neither by nvflash under windows (nvflash says : unknown eeprom - BF,008D : this is a SST chip) This is a 2Mbits spi eeprom with a sot-23 package.
sot-23 would be pretty spectacular... because that has only 3 pins ;) I believe you mean SOIC-8 instead.
SPI flashes can use a few different ID methods which often share (parts of) ID bytes. 0xBF is indeed the SST vendor ID... and 0x8d is even (the main) part of a known device: the SST25VF040B. But it should be detected ok with flashrom. Can you please send us the log produced with: flashrom -p buspirate_spi:dev=COM5 -VVV -o SST25VF040B_probe_spew.log Maybe I can spot what/if something is wrong.
The top marking of the chip would also help very much in verifying if it is a SST25VF040B or something else.